Copy .gitignore from js-generator-openstack template

Change-Id: I83397a517a188240a9f8af17951522d287d81c5e

.gitignore

@@ -1,8 +1,40 @@
-# IDE Exclusions
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Test reporting directories used by zuul
+cover
+reports
+
+# Project output directories
+package
+dist
+www
+build
+
+# Dependency directories
+node_modules
+bower_components
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+
+# IDE files
 *.iml
-.idea/
+.idea
+
+# OS-specific
+.DS_Store
 
-# Node generated files
-package/
-node_modules/
-npm-debug.log